Re: [RFC PATCH] mm: migrate: Add new node demotion strategy

[Dave Hansen]

On 11/7/21 1:33 AM, Baolin Wang wrote:
> Thanks for your suggestion. After some thinking, can we change the
> node_demotion[] structure like below? Which means one source node can be
> demoted to mutiple target node, and we can set up the target node mask
> according to the node distance. How do you think? Thanks.
> 
> static nodemask_t node_demotion[MAX_NUMNODES] __read_mostly =
>         {[0 ...  MAX_NUMNODES - 1] = NODE_MASK_NONE};

How large is that in the worst case?